How to get feature extraction

i have the problem. how to get feature extraction for example my object is a hand and how to steps to do it. Note i use matlab 2009 and 2012

[Dr S.N KUMAR]

I think hand in the sense whether you are trying for biometrics application.

many feature extraction techniques are there like 1. Texture feature extraction (use GLCM in matlab) 2. Gabor feature extraction 3. Transform based feature extraction

Answer 1

[Image Analyst]

It depends on what is in your image that you want to find. There is no one segmentation algorithm that works for everything. Perhaps you want to find something in a grayscale image based on its brightness. If so, see the Image Segmentation Tutorial in my File Exchange http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862. Maybe you want to find something based on its color. If so, I also have color segmentation demos in there. Maybe you want to find something based on shape or texture. Each type of image requires its own custom algorithm which can range from trivial (like thresholding) to very complicated (like finding squishy things with ill defined borders in biological or medical images).